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authorAllan Stephens <allan.stephens@windriver.com>2011-11-03 19:12:01 +0400
committerPaul Gortmaker <paul.gortmaker@windriver.com>2012-02-25 02:05:14 +0400
commitf80c24d9964c8a15c55d1afc2dea327c5eff7d6b (patch)
tree8a174990875cf1e7bfc8e0dff2272d5488bd7807 /net/tipc
parentc422f1bdc3d3f9f637b3d288a6601668e26111d6 (diff)
downloadlinux-f80c24d9964c8a15c55d1afc2dea327c5eff7d6b.tar.xz
tipc: Add check to prevent insertion of duplicate name table entries
Adds a new check to TIPC's name table logic to reject any attempt to create a new name publication that is identical to an existing one. (Such an attempt will never happen under normal circumstances, but could arise if another network node malfunctions and issues a duplicate name publication message.) Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/name_table.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 1196f050e334..c2224f98e64f 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -268,6 +268,13 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
}
info = sseq->info;
+
+ /* Check if an identical publication already exists */
+ list_for_each_entry(publ, &info->zone_list, zone_list) {
+ if ((publ->ref == port) && (publ->key == key) &&
+ (!publ->node || (publ->node == node)))
+ return NULL;
+ }
} else {
u32 inspos;
struct sub_seq *freesseq;